.main{
    width: 100%;
    height: 100%;
    color: #fff;
}
.bgc_box{
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    padding: 3vh 2.1vw;
    padding-top: 9.7vh;
    background: url(../../assets/img/blue/bg.png) no-repeat;
    background-size: 100% 100%;
}
.mian_top{
    display: flex;
}
.mian_top>div{
    width: 33%;
 height: 42.6vh;
    margin-right: 1vw;
}
.mian_top>div:last-child{
    margin-right: 0;
}